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??????????????GB5310-1995??
Seamless Steel Tubes And Pipes for High Pressure Boiler
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GB5310------?й???????Chinese National Standard
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???????????????????????9.8MPa????,?????????450??~650??????????????????????ú?????????????????????
For manufacture heating-pipelines,containers,coal-saving devices,superheaters and reheaters of high pressure boilers(P>9.8MPa.450??<T<650??)
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20G.20Mng 15MoG 15CrMoG 12Cr2MoG 12Cr1MoV??
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